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Navigation map of the Riau Roadstead (off west coast of Bintan, Riau Archipelago): a body of water sheltered from tides/currents, for ships to anchor. Bathymetry (sea depth) and various obstructions and landmarks (hills, buildings, trees) are shown.

This map of Groot-Atjèh (Aceh, northern Sumatra) focuses on the western part occupied during the Aceh War. It shows mountains, wetlands, forests, villages, routes and crops (rice, coconut, banana, sugar, sugarcane, bamboo, alang-alang, betel).